Drawing-machine.



J. 0. FORTUNE.-

DRAWING MACHINE.

APPLICATION FILED 050.3, 1914.

1,14%1805 1 Patented Aug. 3, 1915.

v 3 swans-sun I. n. FORTUNE.

DRAWING MACHINE.

I APPLICATION FILED DEC. 3, I914. 1,149 Patented Aug. 3,1915.

3 SHEETSSHEET 2- I r I .l. D. FORTUNE.

mmwme momma. I APPLICATION FILED DEC-3| I914.

Patented Aug. 3,1915.

3 SHEETS-SHEET 3- r lzllamlazlp 19 ED STATES PATENT onmon.

JAMES D. FORTUNE, OF LA JOLLA, CALIFORNIA.

DRAWING-MACHINE. v

Specification of Letters Iatent.

' Patented Aug. 3, 1915.

Application filed December 3, 1914. Sefia111'o.875,341. V

' device which may be conveniently moved from place to place for the purpose of drawing diagrams and-the like.

Another object of this invention is the production of a simple and efficient drawing apparatus which is so constructed as to permit the several adjustments of the dlfferent parts wherein the device may be especially used in connection with a blackboard or other device upon which a drawing is to be made.

With these and other objects in view this invention consists of certain novel conbinations, constructions, and arrangements of parts as will be hereinafter fully descrlbed and claimed.

In the accompanying drawings :Figure 1 is a front elevation of the tool or apparatus. Fig. 2 is an edge view thereof. Fig. 3 1s a section taken on line 3-3, of Fig. 1. Fig. 4 is a section taken on'line 4-4, of Fig. 1. Fig. 5 is a section taken on line 5- 5, of Fig. 1. Fig. 6, is a top plan view of the device illustrated in Fig. 1. Fig. 7 is a transverse sectional view through the depending blade and '1' square head showing the manner of attaching the T s uare head to the depending blade. Fig. 8 1s a section taken on line 8--8, of Fig. 2. Fig. 9 is a section taken on line 9-9, of Fig. 2. Fig. 10 is an enlarged sectional view taken on line 10-10, of Fig. 1. Fig. 11 is a sectional view similar to Fig. 10 showing the pivot connection removed between the protractor blade and the T square head. Fig. 12 is an enlarged top plan view of the connection between the pivoted blade and the T square head. Fig. 13 is a bottom plan view of the carnage illustrated in Fig. 1. Fig. 14 is an enlarged sectional view taken on line 14-14, of Fig. 1. Fig. 15 is a fragmentary view of the lower portion of the hanger carriage.

Fig.16 isa side elevation of one of the lower wheel supporting bearings. Fig. 17 is a perspective view of the constru'ction illustrated in Fig. 16. Fig. 18 is'an enlarged top plan view of the socket adapted to engage the compass supporting mechanism. ,Fi 19' is a section taken on line AA of ig. 1. Fig. 20 is a section taken on line X-X of Fig. 9. Fig. 21 is a transverse sectional view through the compass rod su porting clamp shownng the manner in which the By referring'tothe drawings it will be seen that a track is employed upon which compass rod is attached thereto or other suitable support or mechanism. It will be seen that the track comprises an inner channel portion 1 and anouter channel portlon 2 having flanges 3 formed u on their respective side edges as clearly il us trated in Figs. 3 and 4. It will, therefore, be seen that a track portion 4 is formed upon the top and lower edges of the track I the present device is supported-upon a wall upon which the wheels 5 are adapted to travel forjsupporting the carriage upon the track. It should be understood that the track may be secured to a wall or other suitable support by means of screws or other sultable securin devices. A carriage 6 is adapted to trave upon the track and is supported by means of the wheels 5, this carr1age'6 being substantially U-shaped in cross sectlon so as to overhang the upper and lower edges of the track. The carriage is provided with a plurality of cut out portrons 7 for the purpose of making the hanger frame of a light-construction. The wheels 5 are su ported in suitable journals 8 as illustrate .in Fig. 1. The lower wheels 5 are supported upon ournals 8 similar to the upper wheels 5, but thelower journals 8 are carried by the pivotally mounted supporting blocks 9, which blocks have their bifurcated ends 10 fitting over the tongues 11 formed upon the depending lugs 12 of the carriage frame 6. A thumb screw 13 is carried by each of the lugs 12 and engages a spring 14, which lower wheels 5 in engagement with the lower face of the supporting track. It should be understood that by tightening-the thumb screws 13, the tension of the springs 1 14 may be increased to firmly hold the carriage upon the track which supports the same.

l i I 1 l which channel portion is fitted the depending hanger .blade 16 as is illustrated in F igs; l and 5. Thisblade 16 is held in enfgagement with the channel portion by means of the machine screws '17 as illustrated in Fig. 5. The hanger blade 16 is provided with a rib portion 18 extendingv longitudinally thereof, which rib portion is provided with-laterally extending'flanges 19 as is clearly illustrated in Fig. 8.

A T square head 20 is slidably mounted I upon the hanger blade 16 and this T square head 20 is provided with an inwardly extending rib 21 for fitting under one of the flanges 19 formed upon the rib 18 as is illustrated in Fig. .8. The. head 20 is provided with a plurality of upwardly extending end flanges 22 and a centrally upwardly extending flange 23. The trigger plate 24 is pivotally mounted upon the central flange portion 23 by means of the pivot connection 25 illustrated clearly in Fig. 9, and coil springs 26 are interposed between the end flanges 22 and the respective ends of the trigger plate 24 for normally urging an outward pressure upon the upper ends of the trigger plate 24.

A plurality oftransversely movable locking bars 27 are slidably mounted upon the head 20, and these locking bars 27 are pro vided with T square upper portions 28 which work in the T-square upper notches 29fo'rmed in the head 20 for constituting an eflicient means for holding the blocks 27 in firm engagement with the head 20 and at the same time allowing a free movement thereof relative to the head 20. The inner end of the blocks 27 are so formed as to snugly fit around the flange portions 19 of the rib 18 and it will be seen that the coil springs 26 will normally urge the blocks 2 inwardly so as to cause the same to firmly grip the rib 18 and hold the head20 in a set position upon the. rib 18 and upon the depending blade 16. The head 20 is pro- 4 I vided with a centrally located u wardly extending rib 30 which will constitute an efi-- cient finger grip .to facilitatethe operation of the trigger plate 24.

A blade 31 s: pivotally secured to es rejecting tongue'portion 32 of the head 20 by vmeans of a pin 33, and this blade 31in. ro-

vided with an arc scale 34 adjacent the wet pin 33 to allow for the change of ang e of the-blade 31 relative to the head 20. The

blade 31 is graduated as is usual, as is also the blade 15, for the purpose of securing the desired measurements. I

A socket plate 35 is carried by the blade 31 and this socket plate is provided with a plurality of se mental inwardly extending anges 36 as ilustrated in 18, under which flanges are adapted to fit the project mg teet 37 of the compass supporting frame I with a socket 39 in which the supporting I head 40 fits and is held in engagement therewith by means of a thumb screw 41. A supportingarm 42 is secured to the head 40 by means of a thumb screw 43 as is illustrated in Fig. 1.

gagement therewith by means of a thumb screw 45. An arm 46 is adjustably held. in

engagement with the clamp 44 by means of.

a thumb screw 47, and a crayon or other suitable marking device is carried by the outer end of the arm 46. as is clearly illus-.

trated in Fig. 1.' I As is illustrated in Fig. 10 the blade 31 is provided with an upwardly extendin rib portion 50 over which fits the aperture end 51 of the head 20. A nut 52 s carried by the screw or bolt 33so as to facilitate the connection of the head 20 to the blade 31.

It should be understood that the adjustable clamp 44 is supported upon a pivot standard 53 having a compass shaft sup porting end 54 for constituting a ivot for the compass arm 46 as illustrated in Fig. 7. From the foregoing description it will be seen that the present device may be readily used for the purpose of making a drawing upon a blackboard or sheet carried upon the side of the wall or the like, and that the vertical or perpendicular lines may be drawn by using the depending blade 16, and. that thecarriage 6 may be readily moved to any desired position u on the track which sup ports the same. 'dt should be understood that this track may be formed in sections for the. purpose of allowing the carriage to be accommodated to difi'erent'length boards An adjustable clamp 44 is carried by the supporting arm 42 and is firmly held in en-- or sheets. It should be further understood.

that the head 20 may be readily moved or adjusted to "a I'desired. position upon the I blade 16 by releasing the trigger plate 24 T out at g ment with the rib portion is of the blade 16.- 1 1 v I Having thusdescribed'the invention is claimed as new, is:'

' 1. A device of theiclass pivptally secured to said head, springsgaging "P ate and head for mg;

ingan outward pressure upon the upper end;

plate, slidahl-y mounted l of said trigger clamp blocks carried by said head and engaging saidtrigger plate and adapted to be moved transversely of said head assaid triger plate is compressed upon said coking said head it on said blade, ,d a

blade I carried by Emi heed;

2. a ate-re or as as easiest eo' -L rat a eas a rib tored t es said r I .pivotally secured to said'head, springs enintense v a blade, a head slidably mounted n on said rib, means for 'holdin said hea against displacement from sai rib, a trigger plate gaging said trigger plate and head for urging an outward pressure upon the up er end of saidtrigger p ate, slidably moun said trigger plate and ads ted to be'mov transversely of said hes. as said tri ger plate is compressed upon said head for oek- 1ng said head upon said blade, 9. blade carclampblocks carried by said head and riedby said heed, and afinger pieee carried by said head and spaced from said trigger plate for facilitating the operation of said 15 Jams 10. FORTUNE} Witnw es: L. H. Mam, I

Mrs. L. w 

